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CONDENSED BALANCE SHEETS (UNAUDITED) (Parentheticals) - USD ($)
Nov. 30, 2018
Feb. 28, 2018
Allowance for doubtful accounts (in Dollars) $ 303,500 $ 297,100
Common Stock, par value (in Dollars per share) $ 0.20 $ 0.20
Common Stock, shares authorized 16,000,000 16,000,000
Common Stock, shares issued 12,092,080 12,092,080
Common Stock, shares outstanding 8,203,119 8,179,612